EP 2820113 B1 20170712 - PROCESSES AND COMPOSITIONS FOR CLEANING MIXING DEVICES TO IMPROVE POLYCARBONATE PRODUCTION
Title (en)
PROCESSES AND COMPOSITIONS FOR CLEANING MIXING DEVICES TO IMPROVE POLYCARBONATE PRODUCTION
Title (de)
VERFAHREN UND ZUSAMMENSETZUNGEN ZUM REINIGEN VON MISCHVORRICHTUNGEN ZUR VERBESSERUNG DER HERSTELLUNG VON POLYCARBONAT
Title (fr)
PROCÉDÉS ET COMPOSITIONS POUR NETTOYER LES DISPOSITIFS DE MÉLANGE AFIN D'AMÉLIORER LA PRODUCTION DE POLYCARBONATE
Publication
Application
Priority
- US 201261604070 P 20120228
- US 201261659766 P 20120614
- US 2013027127 W 20130221
Abstract (en)
[origin: US2013220376A1] Processes and compositions for cleaning mixing devices are disclosed that improve the production and quality of thermoplastic polymer resins subsequently produced in the mixing device, while reducing the time needed for cleaning and/or change over. A cleaning mixture comprising polymeric resin pellets having a Rockwell R hardness of 85 to 140 externally coated with an aqueous solution containing sulfonate salts, alkyl aryl sulfonate salts, alkyl sulfate salts, C6 to C36 carboxylic acid salts, or mixtures thereof, is used to purge the mixing device. The surfactant salt is present in the aqueous solution at 0.2 to 30 wt % of the solution, the aqueous solution having a pH of 6.0 to 9.0.
IPC 8 full level
C11D 3/37 (2006.01); B29C 48/27 (2019.01); B29C 48/92 (2019.01); C08K 5/42 (2006.01); C11D 1/22 (2006.01); C11D 11/00 (2006.01); C11D 17/00 (2006.01)
CPC (source: CN EP US)
B08B 7/0064 (2013.01 - US); B08B 7/0071 (2013.01 - US); B29C 48/27 (2019.01 - CN EP US); B29C 48/92 (2019.01 - CN EP US); C11D 1/146 (2013.01 - CN EP US); C11D 1/22 (2013.01 - CN EP US); C11D 1/24 (2013.01 - CN EP US); C11D 1/29 (2013.01 - CN EP US); C11D 3/37 (2013.01 - CN EP US); C11D 3/3707 (2013.01 - US); C11D 3/3715 (2013.01 - CN EP US); C11D 3/3719 (2013.01 - CN EP US); C11D 3/3749 (2013.01 - CN EP US); C11D 9/225 (2013.01 - CN EP US); B29C 2948/92704 (2019.01 - CN EP US); B29C 2948/9299 (2019.01 - CN EP US); C11D 2111/20 (2024.01 - CN EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2013220376 A1 20130829; US 9347026 B2 20160524; CN 104144779 A 20141112; CN 104144779 B 20170222; CN 104145013 A 20141112; CN 104145013 B 20170510; EP 2819827 A1 20150107; EP 2819827 B1 20170628; EP 2820113 A1 20150107; EP 2820113 B1 20170712; ES 2638388 T3 20171020; ES 2638964 T3 20171024; ES 2638964 T8 20171207; US 2013225465 A1 20130829; US 2016186104 A1 20160630; US 8729003 B2 20140520; US 9856443 B2 20180102; WO 2013130333 A1 20130906; WO 2013130345 A1 20130906
DOCDB simple family (application)
US 201313774524 A 20130222; CN 201380011572 A 20130221; CN 201380011590 A 20130222; EP 13708010 A 20130221; EP 13708021 A 20130222; ES 13708010 T 20130221; ES 13708021 T 20130222; US 2013027127 W 20130221; US 2013027231 W 20130222; US 201313774498 A 20130222; US 201615061384 A 20160304